Malicious RTF — malware analysis report

Static analysis result for SHA-256 cbd2d532b0b61587…

MALICIOUS

RTF

151.3 KB Created: 2017-08-03 21:04:00 First seen: 2017-08-08
MD5: a8f37168c5095bc9527fdb279819b8b6 SHA-1: 77ab3ac44d68aa9c486b0f7c04bd057b7ac34605 SHA-256: cbd2d532b0b61587907f2aaed20dfbe36c6c397164c6f5ec1fc8400d6d47a0b7
202 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The sample is an RTF document that leverages the CVE-2017-0199 vulnerability to download and execute an OLE object from the URL http://www.thyssenkrupp-marinesystems.org/templater.doc. This exploit allows for remote code execution, indicating a malicious intent to compromise the user's system. The document body itself appears to be benign corporate news, suggesting the exploit is the primary malicious component.

Heuristics 6

  • CVE-2017-0199 (OLE2Link / remote URL Moniker) critical CVE likely CVE_2017_0199
    RTF contains a URL Moniker OLE link whose decoded target is remote. Office can fetch and process the response through the CVE-2017-0199 OLE2Link attack path, but the server-side content type is not proven statically.
  • ClamAV: Rtf.Exploit.CVE_2017_0199-6335035-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Rtf.Exploit.CVE_2017_0199-6335035-0
  • Automatically linked OLE object high RTF_OBJAUTLINK
    RTF contains \objautlink — an automatically linked OLE object surface that can be updated or activated when Word opens the document.
  • OLE object data medium RTF_OBJDATA
    RTF contains 2 \objdata section(s) — embedded OLE objects
  • OlePres presentation stream in RTF OLE object medium RTF_OLEPRES_STREAM
    RTF contains an embedded OLE object with an OlePres presentation stream. OlePres is an OLE presentation marker and is not enough on its own to identify CVE-2025-21298.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://usetermassembly/dealbuilder_live/DealBuilderNET/dealbuilder.aspx In RTF body
    • http://www.thyssenkrupp-steel.comIn RTF body
    • https://engineered.thyssenkrupp.com}{In RTF body
    • http://www.thyssenkrupp-marinesystems.org/templater.docIn RTF body
    • https://engineered.thyssenkrupp.comIn RTF body
    • http://schemas.microsoft.com/office/word/2003/wordmlIn RTF body
    • https://www.microsoft.com/en-us/download/details������������������������������������������������������������������In RTF body

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off00015fe0.bin rtf-objdata-decoded RTF \objdata at offset 0x15FE0 5584 bytes
SHA-256: 1306239315b6cd7918a38fae58c19101ec326a1ca1f7e7256f30cfba9ec94966
objdata_01_off0001cee1.bin rtf-objdata-decoded RTF \objdata at offset 0x1CEE1 5600 bytes
SHA-256: 63f08b287ac453cea898dab37d751941cb067a4c66bd99afbfff71da9cb4a37f

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